Transactions of Nanjing University of Aeronautics & Astronautics Information for Contributors

Transactions of Nanjing University of Aeronautics&Astronautics (TNUAA) is a bimonthly journal facing international academic community. Emphasizing prompt and effective dissemination of key data and new scientific insights, TNUAA offers publication of new experimental and theoretical papers bearing on applications to all branches of aeronautics, astronautics and civil aviation.

Brief Introduction of Transactions of Nanjing University of Aeronautics & Astronautics

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Transactions of Nanjing University of Aeronautics & Astronautics Information for Contributors

Transactions of Nanjing University of Aeronautics&Astronautics;(TNUAA)is a bimonthly journal facing international academic community.Emphasizing prompt and effective dissemination of key data and new scientific insights,TNUAA offers publication of new experimental and theoretical papers bearing on applications to all branches of aeronautics,astronautics and civil aviation.

TRANSACTIONS OF NANJING UNIVERSITY OF AERONAUTICS & ASTRONAUTICS

Transactions of Nanjing University of Aeronautics & Astronautics (ISSN 1005-1120) is a comprehensive academic publication focusing on the research achievements in aeronautics, civil aviation, astronautics and their theoretical basis. It mainly publishes the papers on advancements in science and technology researches, and significant achievements in

Transactions of Nanjing University of Aeronautics & Astronautics Information for Contributors

From the XRD pattern （Fig. Sic）, bacterial cellulose （BC） shows a typical profile of cellulose 1 with three typical dif fraction peaks occurring in the region of 10 25°. Besides, BC possesses abundant surface hydroxyl groups （ OH） along its networks with negatively charged sites.

Welcome to Subscribe for Transactions of Nanjing University of Aeronautics & Astronautics

Transactions of Nanjing University of Aeronautics & Astronautics (TNUAA, in English) is a comprehensive academic publication which deals mainly with the research achievements in aeronautics, civil aviation, astronautics and their theoretical basis. It is published by Nanjing University of Aeronautics & Astronautics, and has started its publication since Oct.

Beijing Astronautics Changfeng Medical Equipment Co.Ltd

The Beijing Astronautics Changfeng Medical Equipment Co. Ltd is a large enterprise within the Chinese astronautics system. It is the only key enterprise manufacturing anesthesia machines,monitoring instruments and respirators in China that has been in operation for ten years. The products are used in sev-

Model Recognition of Astronauts Blood Flow Change Under Sustained +Gz Acceleration

Aim Using animals as object of experiment to acquire various patterns of low cerebral blood pressure and reduced blood capacity in cerebral tissues of astronauts due to the load of acceleration. Methods The isotope tracking technique was applied to mark the blood and record the dynamic curves of cerebral blood flow changes under various accelerations, and the relevant mathematical model was set up using the method of system recognition. Also the method of factor analyzing was used to select two out of the data collected by eight sensors as two factors. Results One of the two factors reflects the various patterns in the astronaut's upper body, the other for the lower body. Parameters of rise time, delay time and steady value reflect the results under different acceleration. Conclusion Whether for the upper body or the lower body, blood flow changes can be considered as a second order system model. This method provides a new technique and method of doing research on astronaut's endurance of acceleration and selecting astronauts.

Welcome to Subscribe TNUAA

Transactions of Nanjing University of Aeronautics&Astronautics(TNUAA,in English)is a comprehensive academicpublication which deals mainly with the research achievements in aeronautics,civil aviation,astronautics and their theoreti-cal basis.It is published by Nanjing University of Aeronautics&Astronautics,and has started its publication since Oct.1982.The original name of the journal is“Journal of Nanjing Aeronautical Institute”(English Edition).It was an annual.Since1993 it has been renamed TNUAA and is published semi-annually every June and December.The periodical numberis ISSN1005-1120.The rename transactions has been published since the second half of the year1993.The

Applications of Atomic and Molecular Theory to Calculations in Space Science and Engineering

A systematic elaboration is given on atomic and molecular theory problems encountered in dealing with space science and engineering. Three sections are presented in the paper on calculations for gas thermodynamic and transfer properties, characteristics of the optical radiation from the reentry' bodies, and the interaction between surfaces of man-made satellites and incident particles. Researches on them are much related to the fundamental problems regarding the atomic and molecular theory.

A Mathematical Model for Magnetohydrodynamic Convection Flow in a Rotating Horizontal Channel with Inclined Magnetic Field, Magnetic Induction and Hall Current Effects

Closed-form and asymptotic solutions are derived for the steady, fully-developed hydromagnetic free and forced convection flow in a rotating horizontal parallel-plate channel under the action of an inclined magnetic field and constant pressure gradient along the longitudinal axis of the channel. The magnetic field is strong enough to generate Hall current effects and the magnetic Reynolds number of sufficient magnitude that induced magnetic field effects are also present. Secondary flow is present owing to the Hall current effect. The channel plates are also taken to be electrically-conducting. The conservation equations are formulated in an (x, y, z) coordinate system and non-dimensionalized using appropriate transformations. The resulting non-dimensional coupled ordinary differential equations for primary and secondary velocity components and primary and secondary induced magnetic field components and transformed boundary conditions are shown to be controlled by the dimensionless pressure gradient parameter (px), Hartmann number (M2), Grashof number (G), Hall current parameter (m), rotational parameter (K2), magnetic field inclination (&#920), and the electrical conductance ratios of the upper (&#9201) and lower (&#9202) plates. Solutions are derived using the method of complex variables. Asymptotic solutions are also presented for very high rotation parameter and Hartmann number of order equal to unity, for which Ekman-Hartmann boundary layers are identified at the plates. A parametric study of the evolution of velocity and induced magnetic field distributions is undertaken. It is shown that generally increasing Hall current effect (m) serves to accentuate the secondary (cross) flow but oppose the primary flow. An increase in rotational parameter (K2) is also found to counteract primary flow intensity. An elevation in the Grashof number i.e. free convection parameter (G) is shown to aid the secondary induced magnetic field component (Hz);however there is a decrease in magnitudes of the primary induced magnetic field component (Hx) with increasing Grashof number. Increasing inclination of the applied magnetic field (&#920, is also found to oppose the primary flow (u1) but conversely to strongly assist the secondary flow (w1). Both critical primary (Gcx) and secondary (Gcz)Grashof numbers are shown to be reduced with increasing inclination of the magnetic field (&#920), increasing Hall parameter (m) and rotational parameter (K2). Applications of the study arise in rotating MHD induction power generators and also astrophysical flows.

China Academy of Launch Vehicle Technology

November 11,1992 was the thir-ty fifth anniversary of China A-cademy of Launch Vehicle Technol-ogy(CALT),which grows out ofthe First Branch of the Fifth Acade-my under the Ministry of NationalDefence.Dr.Qian Xuesen was itsfirst president. Since its establishment in 1957,under the guidance of the principleof relying on our own efforts,striking for external assistance andmaking good use of science andtechnology achieved by the devel-oped countries,CALT has been de-

Making Space Cooperation and Bringing Benefits to Mankind

This year is the InternationalSpace Year,therefore China carriedout a series of scientific activities tospread astronautics knowledge andsent a delegation to attend theWorld Space Congress held inWashington,to participate in spacetechnology exhibition,to carry outspace scientific and technical ex-change with our friends and to seekthe ways for space technical cooper-ation.I believe,these activitieswill surely promote the developmentand application of the world spacetechnology,serve the world

Frontier Research in Hand, National Demands in Mind——An Interview with XIONG Ke, Director of the State Key Laboratory of Mechanics and Control of Mechanical Structures-

·Prof.XIONG,could you please give us a brief introduction to SKLMCMS？Director XIONG Ke：The State Key Laboratory of Mechanics and Control of Mechanical Structures（SKLMCMS）was established with the approval of the Ministry of Science and Technology of the People’s Republic of China in October 2011.The laboratory is located at Nanjing University of Aeronautics and Astronautics（NUAA）.

On-orbit sleep problems of astronauts and countermeasures

Sufficient sleep duration and good sleep quality are crucial to ensure normal physical and mental health, cognition and work performance for the common people, as well as astronauts. On-orbit sleep problem is very common among astronauts and has potential detrimental influences on the health of crewmembers and the safety of flight missions. Sleep in space is becoming a new medical research frontier. In this review we summarized on-orbit sleep problems of astronauts and six kinds of causes, and we presented the effects of lack of sleep on performance as well as mental and physical health, then we proposed seven kinds of countermeasures for sleep disturbance in spaceflight, including pharmacologic interventions, light treatment, crew selection and training, Traditional Chinese Medicine and so on. Furthermore, we discussed and oriented the prospect of researches on sleep in space.